My maternal grandfather (my house is on the west side of his farm) taught me the gasoline-down-the-hole trick for yellow jackets (ground wasps) back in the 60s.
More recently, I use RAID Wasp & Hornet spray (the directional, high-volume stuff) ... knocks them down on contact.
When I locate a nest of the little buggers, I recon during the day to check for all of the entrances ... each will need a rock, which I locate and place nearby.
After dark I quickly seal all entrances but one, nuke it heavily and drop the last rock on it.
That usually solves the problem.![]()